Dave Fowler is a member of the Resistance in Far Cry 5 and the co-owner of the F.A.N.G. Center in the Whitetail Mountains region, is first met at Fowler's Retreat, a cabin near Widow's Creek.
While his brother Wade, the other co-owner, ran the F.A.N.G. Center and took care of the animals, Dave took care of the merchandise.
According to Dave, their bobbleheads of local mascot and celebrity Cheeseburger were one of the best-sellers, and Dave wants to cash in on the recent cult takeover-induced shortage of merchandise and sell them online for large prices ("when we can go online again that is").
The catch is that the cultists have stolen them, and Dave (correctly) assumes they are all over Hope County by now. Talking to Dave starts the side mission Mint Condition, in which you have to find all the 10 missing bobbleheads.